曝光台 注意防骗
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indicating 300 KIAS, and descending 1500 FPM. I expect the A320 was at a similar
speed and configuration due to the phase of flight and distance remaining from the
airport. I have experienced this type of encounter before, but only while in the
close in terminal area, IE downwind vectors, less than 10,000 FT MSL and at
distance of 5-8 miles and at or near the same altitude as the aircraft I was
following. My solution was to climb approximately 100 FT. As a result of this
experience, I usually make a practice of leveling 100 FT high when in this situation,
especially if the winds aloft are less than 10-15 KTS. Based on conditions during
these encounters, I am extra vigilant to the likelihood of an wake encounter
whenever the winds are a quartering tail as I perceive the wake may be being "held
up" by the atmospheric conditions. I recall reading of research that suspects this as
well as confirming wake encounters have been recording at 20+ NM. Based on
what I see and hear from most airmen. I don't believe enough emphasis is being
put on ensuring this information is provided to pilots and controllers during training.
Most seem to believe they are safe as long as the "required" separation is
maintained and do not understand that this operation is a "minimum" distance
while not a factor in this instance. I also see a lack of understanding by pilot that
they are taking sole responsibility for wake turbulence avoidance and separation
when they accept a visual approach as plans to reduce separation in the future
grow closer to implementation, it is critical that this information as well as good
situational awareness be a part of all flight operations.
Synopsis
A business jet encountered an A320's wake vortex 17 NM behind and 1400 FT
above the traffic descending on an arrival.
ACN: 848040 (4 of 50)
Time / Day
Date : 200908
Local Time Of Day : 1201-1800
Place
Locale Reference.Airport : DFW.Airport
State Reference : TX
Altitude.AGL.Single Value : 100
Environment
Flight Conditions : VMC
Light : Daylight
Aircraft : 1
Reference : X
ATC / Advisory.Tower : DFW
ATC / Advisory.TRACON : D10
Aircraft Operator : Air Carrier
Make Model Name : Medium Large Transport, Low Wing, 2 Turbojet Eng
Crew Size.Number Of Crew : 2
Operating Under FAR Part : Part 121
Flight Plan : IFR
Mission : Passenger
Flight Phase : Initial Approach
Flight Phase : Final Approach
Route In Use : Visual Approach
Airspace.Class B : DFW
Aircraft : 2
Reference : Y
ATC / Advisory.Tower : DFW
ATC / Advisory.TRACON : D10
Aircraft Operator : Air Carrier
Make Model Name : B767 Undifferentiated or Other Model
Operating Under FAR Part : Part 121
Flight Plan : IFR
Mission : Passenger
Flight Phase : Final Approach
Flight Phase : Initial Approach
Route In Use : Visual Approach
Airspace.Class B : DFW
Person
Reference : 1
Location Of Person.Aircraft : X
Location In Aircraft : Flight Deck
Reporter Organization : Air Carrier
Function.Flight Crew : Pilot Flying
Function.Flight Crew : Captain
Qualification.Flight Crew : Air Transport Pilot (ATP)
Qualification.Flight Crew : Glider
Qualification.Flight Crew : Sea
Qualification.Flight Crew : Instrument
Qualification.Flight Crew : Multiengine
Experience.Flight Crew.Total : 20500
Experience.Flight Crew.Last 90 Days : 240
Experience.Flight Crew.Type : 3800
ASRS Report Number.Accession Number : 848040
Human Factors : Situational Awareness
Events
Anomaly.ATC Issue : All Types
Anomaly.Inflight Event / Encounter : Wake Vortex Encounter
Detector.Person : Flight Crew
When Detected : In-flight
Result.Flight Crew : Regained Aircraft Control
Result.Flight Crew : Executed Go Around / Missed Approach
Assessments
Contributing Factors / Situations : Weather
Contributing Factors / Situations : Procedure
Contributing Factors / Situations : Human Factors
Contributing Factors / Situations : Environment - Non Weather Related
Primary Problem : Procedure
Narrative: 1
11000 FT on BOWIE 9 STAR @ 270 KIAS into DFW. Slowed again and turned off
course to allow traffic to go ahead of us. We were cleared behind them 7 NM to
5000 FT and encountered the B767 heavy wake turbulence. This was reported to
ATC, we were at 250 KIAS as per STAR. A stern, annoying dark voice came on
(supervisor?) and we were instructed to maintain 210 KIAS and expedite to 5000
FT. B767 was cleared to land Runway 18L, which is normally the takeoff runway on
west side at DFW. Landing Runway 18L is shorter taxi to gate. ATC was expediting
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